The BMW M4 Convertible (F83), produced from 2014 to 2020, represents the open-top variant of BMW’s high-performance 4 Series. Specifically, the 3.0-liter (2979 cc) inline-six cylinder model, generating 431 horsepower, occupied the top performance tier within the F83 lineup. It was positioned as the convertible equivalent of the M4 Coupe, offering a blend of exhilarating performance and open-air driving enjoyment. The F83 generation was the successor to the E85 Z4 M Roadster and shared its platform with the standard 4 Series Convertible (F33), but distinguished itself through significant mechanical upgrades and aggressive styling cues characteristic of the M division.
Technical Specifications
| Brand | BMW |
| Model | M4 |
| Generation | M4 Convertible (F83) |
| Type (Engine) | 3.0 (431 Hp) |
| Start of production | 2014 |
| End of production | 2020 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Cabriolet |
| Seats | 4 |
| Doors | 2 |
| Fuel consumption (economy) – urban | 12.4 l/100 km (19 US mpg, 22.8 UK mpg, 8.1 km/l) |
| Fuel consumption (economy) – extra urban | 7.2 l/100 km (32.7 US mpg, 39.2 UK mpg, 13.9 km/l) |
| Fuel consumption (economy) – combined | 9.1 l/100 km (25.8 US mpg, 31 UK mpg, 11 km/l) |
| CO2 emissions | 213 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 4.6 sec |
| Acceleration 0 – 62 mph | 4.6 sec |
| Acceleration 0 – 60 mph | 4.4 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 4.1 kg/Hp, 246.3 Hp/tonne |
| Weight-to-torque ratio | 3.2 kg/Nm, 314.3 Nm/tonne |
| Power | 431 Hp @ 5500-7300 rpm |
| Power per litre | 144.7 Hp/l |
| Torque | 550 Nm @ 1850-5500 rpm (405.66 lb.-ft. @ 1850-5500 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | S55B30A |
| Engine displacement | 2979 cm3 (181.79 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | Inline |
| Cylinder Bore | 84 mm (3.31 in.) |
| Piston Stroke | 89.6 mm (3.53 in.) |
| Compression ratio | 10.2:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | Twin-power turbo, Intercooler |
| Engine oil capacity | 6.5 l (6.87 US qt | 5.72 UK qt) |
| Coolant | 13.9 l (14.69 US qt | 12.23 UK qt) |
| Kerb Weight | 1750 kg (3858.09 lbs.) |
| Max. weight | 2250 kg (4960.4 lbs.) |
| Max load | 500 kg (1102.31 lbs.) |
| Trunk (boot) space – minimum | 220 l (7.77 cu. ft.) |
| Trunk (boot) space – maximum | 370 l (13.07 cu. ft.) |
| Fuel tank capacity | 60 l (15.85 US gal | 13.2 UK gal) |
| Length | 4671 mm (183.9 in.) |
| Width | 1870 mm (73.62 in.) |
| Width including mirrors | 2014 mm (79.29 in.) |
| Height | 1386 mm (54.57 in.) |
| Wheelbase | 2812 mm (110.71 in.) |
| Front track | 1579 mm (62.17 in.) |
| Rear (Back) track | 1603 mm (63.11 in.) |
| Front overhang | 811 mm (31.93 in.) |
| Rear overhang | 1048 mm (41.26 in.) |
| Ride height (ground clearance) | 116 mm (4.57 in.) |
| Drag coefficient (Cd) | 0.34 |
| Minimum turning circle (turning diameter) | 12.2 m (40.03 ft.) |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the rear wheels of the vehicle. |
| Drive wheel | Rear wheel drive |
| Number of gears and type of gearbox | 6 gears, manual transmission |
| Front suspension | Double wishbone |
| Rear suspension | Independent multi-link suspension |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 255/40 ZR18 95Y; 275/40 ZR18 99Y |
| Wheel rims size | 9J x 18; 10J x 18 |
Powertrain & Engine Architecture
The heart of the M4 Convertible is the S55B30A 3.0-liter inline-six engine. This engine is a highly modified version of the N55 engine found in other BMW models. Key features include direct fuel injection, a twin-scroll twin-turbocharger setup, and a closed-deck engine block for increased strength. The engine produces 431 horsepower at 5,500-7,300 rpm and 405 lb-ft of torque between 1,850 and 5,500 rpm. The S55 utilizes Valvetronic technology, allowing for precise control of valve lift and timing, optimizing both power and efficiency. The standard transmission was a six-speed manual, though a seven-speed M Double Clutch Transmission (M DCT) with paddle shifters was a popular option. The M DCT offered faster shift times and launch control functionality.
Driving Characteristics
The M4 Convertible, even with the manual transmission, delivered a thrilling driving experience. The 431 hp engine provided ample power for spirited acceleration, with 0-60 mph times around 4.4 seconds. The M DCT equipped models were slightly quicker. The inline-six engine’s broad torque curve meant strong pull throughout the rev range. Compared to the standard 4 Series Convertible, the M4 offered significantly sharper throttle response, tighter suspension tuning, and more aggressive steering feel. While the convertible body added some weight compared to the coupe, the M4 still felt balanced and agile. The exhaust note was particularly aggressive, enhancing the overall driving experience.
Equipment & Trim Levels
The M4 Convertible came well-equipped as standard. Interior features included sport seats upholstered in leather, a multi-function steering wheel, and a premium sound system. Standard exterior features included M-specific aerodynamic enhancements, quad exhaust outlets, and M-branded side gills. Optional extras were plentiful, including carbon fiber trim, upgraded leather upholstery, a head-up display, and a driver assistance package. The convertible top was a fully automatic retractable hardtop, offering good insulation and security.
Chassis & Braking
The M4 Convertible featured a reinforced chassis compared to the standard 4 Series, designed to handle the increased power and stresses of high-performance driving. The suspension consisted of a double-wishbone front suspension and an independent multi-link rear suspension, both with M-specific tuning. Large, ventilated disc brakes were standard at all four corners, providing excellent stopping power. The M4 also featured an M Dynamic Damper Control system, allowing the driver to adjust the suspension stiffness to suit their preferences.
Market Reception & Comparison
The M4 Convertible was generally well-received by automotive critics. It was praised for its powerful engine, engaging driving dynamics, and luxurious interior. However, some critics noted the added weight of the convertible top compromised handling slightly compared to the coupe. Compared to other high-performance convertibles of the time, such as the Porsche 911 Cabriolet, the M4 offered a compelling combination of performance and value. Fuel economy, at around 25.8 US mpg combined, was reasonable for a car of its performance caliber. Reliability was generally good, though preventative maintenance was crucial to address potential oil leaks and cooling system issues.
Legacy
The BMW M4 Convertible (F83) remains a desirable used car today. The S55 engine is known for its robustness, but regular maintenance, including oil changes and cooling system inspections, is essential. The M4 Convertible offers a unique blend of performance, luxury, and open-air driving enjoyment. Its strong performance and iconic status within the BMW M lineup ensure its continued appeal to enthusiasts. The F83 generation represents a significant step forward in convertible performance, setting a high benchmark for future open-top M cars.
